A gene for lactose tolerance

Lactose tolerance is the ability to digest the lactose in milk and other everyday dairy products. For the majority of people, tolerance for lactose decreases after infancy, often falling away completely during adulthood. However, for others, due to a genetic variant in their DNA, they are able to continue to tolerate lactose indefinitely. Your FitnessGenes result will tell you whether you are genetically able to tolerate lactose.

Milk is for babies. When you grow up you have to drink beer so said bodybuilding icon Arnold Schwarznegger. So was Arnie right? Well, maybe, if you are lactose intolerant.

As babies, with few exceptions, we can all drink milk. Packed full of calcium and protein, it provides us with an excellent source of energy during the rapid growth and development of our infancy. However for some of us, as we get older, our ability to digest milk starts to wane, and dairy consumption starts to produce some uncomfortable side effects, such as bloating, excess wind and stomach cramps.

So what exactly is going on? It’s all down to a sugar found in milk and other dairy products called lactose.

You can find more information about the LCT gene in our member area at where you can also find your results and what this means for you after your DNA has been analyzed by us. Head over to the shop to order your Fitnessgenes DNA analysis and genetic training system


We have fully reviewed the impact of this gene and the genetic variant we analyse as part of our scientific research process. You can access the full citation list on all studies reviewed here.

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